Typewriting machine



2 Sheets-Sheet 1 W. A. DOBSON TYPEWRITING MACHINE Filed Sept. 18, 1924 l, 4 RN wm m S www Aug.. 7, 1928.

W. A. DOBSQN TYPEWRITING MACHINE Filed Sept. 18, 1924 2 Sheets-Sheet 2 Patentedug. 17,4923. Si; e

earaargoer fwrLLIAiir A. ponsen,` or Bruine-Ercan .oonnnorionn Assrsnonro UNDERwooD jnnniorrr rIsnEReoi/iraivv, ornswpvozeir, u. Y., A oonrenarron or DELAWARE.

f rvrnwairine i/Laonilvn,` Y j A .Application filed Septemberl, 15224.` SeriaLNo 738,336.

This invention relates to automaticallj rei versilole` rilohon-feeding 'devices for typewriters...

V Afeature of the `invention is the provision `to lreverse the follower. e ,t I v.

Figure 51s a top plarilviewj ofthe'part's shown in Figure. l.` f

of idevices which'are conditionedlfhyithe unwinding of a ribbon from aspooland the Y tensioning of the ribbonjfso that the Vdevices areactuable on .the Vdepression of aftypeflzey direction ofxrotation of `the spool.

. Y Other" features and 'advantages "unafter appear. J l v y inthe accompanying drawings; y 1 Figure l is agfront elevation of. that' part of a 'typewriting marhine enibodyingthe present invention. 1 j i Figure 2 is a sectional line 2'2 of Figure l@ e Figure 3 is'alperspective of various shown inthe order ofassembly.

Figure r4 is Va perspective View view.A taken: on` the parts the Figure 6 is a -detailjview showing :the

ypawl-actuator and `parts cooperating there- .wi-thy. f. Y Y

VFigure 7 is a detail .plan vie-w, .partly fin -5section, showing the cam-inechanism.-3

igure '8 is a detail"fragmentofrthe con# nectionsfrom the keys tothe pawlfarctuatin G means. e

`Referring to the drawings, l() designatesV i the usual platenwhiehis rotatively mounted in Vthe platen-frame l2 by `means of `shaft il.'

l; designates the usual keys y secured upon the levers i4,V the rear ends a :of which. are

` Vagainst the tension ofthe usualHlea-spring.

suitablyV fulerumedin thewellglnown manner,.upon-a -ulorumhanl5` 16 designates a U-shaped universalA bar-frame yfulcrumed upon a rodfl? and having a harsection whichis engageablej .by the key-levers 14 2O engaging ,the underside of said frame and tending to hold theuniversal bar, in the normalj operative position shown l:in Figure2. 'Y 1 Links 2l are pivotally mounted at one` end upon each side jarin` 18 `formed integrally with the universal 'barlfraifne 16 s hoi'vn in Figures` l and 8. f 22 Ydesignates part .of the 'main frainefof the typewritin'g niacliine,` and 22, designates the side walls offtliis cation :34 having. a recess 35 engagealole with with said 24 are.=also` secured upon; the shelff2e and serve tohold the key-levers 14 in inoperative position.A 27 designates` two levers which serve to Vact'uate or drive` feed-pawls to be described. These levers are vertically dis- The' inner lwalls29 `of the bracket-members ers dished to provide clearance for, cer-` tain .-vadjaeent. moving parts. Pivoted on pins 31, secured upon the lower ends respectively of the levers or drivers 2f?, are the ends ofthe links 2l, the pivots Qlfor said drivers being secured upon the walls 29 of the bracket-niemhers. The levers 27have at their lowerinost e ends` outwardlyprojecting lugs` 32,. The bracket-members 30 are securedg upon the main frame by means of fasteners Each of the ldrivers or 'levers 27 is provided atitsupper end with a fork or hifur- )ins 36 de endinvromcranlts3T loosel l a P zu .V

jv assembled upon, sleeves 39 ,l whichgpass through the Aholes 38pm the latter, and then enter holes-40 in the members 30, and positionedrotatively'in these `hearings so as to project slightly Y, above the memhersBO. Seured fast upon thejupper projecting ends o'l'fhese'sleeves 39 arek thepanrplates the ratchet-wheels andvcertain cranks. -Ayclamp 41 is adjustahlysecuredupon eaehsleeve within yeachbracket 80. Ashaft42 passes through `and tal-:es a bearing-within a hole 43 of each `sleeve and isl provided at its lowerrnost. endwith a screw-hole 44 in which isthreaded a screw 45 which holds the shaft 42 against'nvertical `displacementfrom the bracket" Cam-plates designated` 46 are formed `with` two angularlyspaced l lobesV designated`47 and 48. VThese cam-plates are .fast upon the upper projecting ends of the sleei/*es .39 and one Vlobe of `each cam Controls r apawl toengage or disengageV the adjacent .ratehetjwlieel, Vwhile the other lobe thereoi engages or disengages a detent 107 coacting" pawl..j` VThe ratcheowheels designated as `49 are secured to spacing heads 49a ormedyinl p 4V.tegrally with the shafts 42and Veach ratchet; main frame/The spring` 2O is seeuredujhy-H `the fasteners 23 to ashelf 26;' "Coil-springs wheel wincludes a spool-driving pin 50 which en tersfay corresponding hole `(not shown)` in n erahly made from shect-metaland each eye lthe i usual ribbon-spools 51, located at each side ofthe platen-frame as illustrated inV i Figure 1.

The freev ends oi the shafts 42 areprovided with screw-holes .53 in Which are threaded thumbsci'ewsll Which hold the spools against displacement.

, Eyes are formed at the upper ends of followers or ribbon-guides 57 which are prefis provided with a diagonal kertl 56 through which `the ink-ribbon 52 isv inserted to` enter.

Y the eyes 55. Each .follower is in the :torni of a' vertcaljlever designed to have a` universal swinging movement. .Each `follower 57 is formed-With a lateral integral arm 58, yto' which is secured one end or" a'suitable eX- vpansion spring 59, .the other end of. which is fixedly secured to la standard61. rlhe Y* standard61 includes 'abuse-portion' 62 lsecured upon the bottom of each bracket 30. A u-lcrum-pin 63 is carried bytivolugs` 64 vtermedintegrally with an arm 7150i' an eX tension 72 of each of the standards 61, 'and a spring 65 extends transversely of each' fol` lowerf57, and has one end secured to alug 66 formed upon a ribbonguide-carrier 67 `andits other end secured to a lug 68 formed upon the follower itself. The guide-carrier 67 has two lugs 70 `that ulcrum upon the pin 6 3 and the ribbon-guide ulcrums upon a stud 69 on the carrier 67 sol as to be'able to swing the guide in two paths at right langles to eachother. The lovver portion of each follower or rihbon-gu1de 57 is `orined `with an arm 73 Vterminatingyin an odset lip 711 disposed practically at right angles with respect to the inainbody-portion of thefoll lower-57 V7 5 designates stop ear formedV y upon each follower `for the purpose-of engagmg-the adjacent edge of the carrier 67 tol prevent the 'follower' from accidentally swingingout of. a normal vertical position so that its lip 74 Will be interposed between theadjacent lever or driver 27 andan actuf ator about to be described.

to the printing zone@v The ribbon 52 is provided at each end `With abead nor eyelet 77` y78 designates portion of the frame of the paper-carriage of the A machine traveling` upon rollers 79 engaging the rail 80'xed to the lmaintraine. VA ldepending lug l81, is formedV upon each of two horizontally-dis posed trip levers `or `triggers 82, each: of

` Whichlevers is pivoted `on'fulcrumpin` 92 and is formed with an arm 83. Each arm 83 has a slot 84 therein which receives a pin' 85 depending from a. crank 86`tormed upon each of the clamps `41 on the sleeves 39, said Y vclamps alsohaving another crank87, formed diametricallyv opposite ,the first cranks '86. Y The cranks 87 are connected to move inl uni-` upon each .bracket 30.

necting rod99'vvhich rearwardly-,ofthe front part of thefrail 80. Thefconnecting rod 9,9 .terminates in `fo'rvvar-dlydireeted arms 9T and 101. The arm 97-is rigidlyv se-V cured to `an extension 89 which has terini'- nal 88 eXt-endingat an angle thereto, The terminal 88l isloosely connected to the crank S7 by meansof a pin 91 on the crank which y Y is received in a slot 90 in the terminal;-

sonso that when. one'is shifted theother Will y also `shi-ft. The connections include a con- The other varm' 101 of they connecting ro'd tension 410l`vvhicli` is rconnected toacr'ank 87 by a pin`j1l06 thereon receiveclin a slot 105 in the extension. i U1 I v A fingerfpieceorcontrol handle 99 is secured at 102 to the'ariii 103er an eX-.

so Y

96 is'seJ cured to they extensionf89 by lvWhiclitheA connetting rod 99 maybe' shi. ted longitudinally Y for rocking the: cranks Y8.7 i y Pan/ls 94 are'pivoted upon studs931o`n the cranks 37 Which are loose upon the sleeves: 39

to vibrate 'between the faces of the brackets 1 i 30 and Athecam-plate 4:6; 'These pavvls have bills` arranged to periodically' engage with i and `be disengagedfrom lthefvteeth of the ratchet-Wheels A 19, itfbeingunderstood that. .l

these Wheelsel havetheir.teethsl'anting in;

opposite' directions;`r Detents`107 [aref provided to engage alternatelyjtlie Lratchet i'vlieels 49 "to prei'fent the"` retrogradeirnovej vmentrthereof when actuated alternatelyby theLeed-pavvls 94. These detente are jpivoted by means oit' pins 108 onarins 109extending v from the frame yside Walls 22a. Each' detentff 107 is held in`engagementwith .the acentratchet-Wheelby Lnieanis oi a spring 110 fvvhich is fiXedly secured at.one 'endto thel 'I' arm `109. Each` panfl91l`is providedwith fa lug l111, to VWhich` is secured one end-ot a spring v112,'theother end .of which" spring is secured to another lug-113 Vformed upon each of the cranks 37,v` and in this manner Y theieedpaivls are held alternatelyin engageinent With'tlie respective ratchet-Wheels. 1

The .horizontal'levers ortriggers V82 are: ulf crumed lupoiithe pivots 92`ivliich-arjefsecured` Y upon ,anjextensionj 'Maleteach bracket-30.

designates ajleaf-spring yvh'chiacts on' 'f the pin'85fforV -the purpose ofi determining the position ofl the' `triggers 62.,.ffl`his spring* vlljissecuredby means of aQsuitahle fastener vThe V.operation 'of` the linvention as, follows: Normally "the tivo followers' t are disposed in-such a manner that'theirflower lips are' spaced `away' from v Contact .with the adjacent .lugs 81 ofthe levers82 vn i'hilevtheir upper ribbon-threaded :endsiinclinef'ioivard A the spool-flangjes` und-er the influence of the -springs 59, asshovn at the right-hand spool onelobe 47ere8"thereoheld in engagement (with thef'paivl 94 tliereadliacentiandprcsscs this pawl out of engagementV xvith'ithe ad# lui) 1 Vjacent ratchetlwheel49, so tliatthis ratchet-4 wheel andthe spoolassociated therewith are pulled rotatively by the ribbon 52 whfch is eingl wound onto' the opposite spool. The other` cam-plate 46de disengaged from the `other feed-pawl 94,y so that the adjacent ratchet-wheel is engaged by its .pawh thel latter being actuated on the down stroke of any key'l, said key vibrating they universal bar l9,` thereby conveying movementlto the link 2l to swingthe vertical lever 27, which,

4through its slot-and-pinV connectionwith the vrpawl#operating` crank 3T, 'actuates the vpawl 94-torotate the associated ratchet wheel In this manner a 'pawl 941continues to feed the ink-ribbon 52 along' the printing jlineof the machine in a xed directionfand -as the feeding` of the ribbon in this direction nears' completion, the bead-77 at one end thereof occupies `thefposition `just in frontfof the upper end of theadjacent follower. or

ribbon-guide 57, and the automatic mechanism v4for effecting the reverse movement of the link-ribbon 52 `is about to be actuated.

As the bead 7 7 approaches the follower from the left towards'theri'ght hand (see Figure il.) it collides 'with the "deft-hand follower land pushesthe guide end thereofright y 36 wardly, thereby swinging the lower lip 74 of thisfollower as shown in Figure l and interi posing the lip between the two lugs 32 and 81 Aof-ythe respective vertical and horizontal v Vlevers'Qand-8d2. VZhen the next typekey 13 is struck by the typist,the vertical lever. 27 is reciprocated, and Vcollideswith the interposed 'follower ,lug or lip-741:0 vibrate the follower upon its stud 69j and againstits? spring 65 and towards the lug 81 of the horizontalltrig; i

gerSQ againstwhich it collides, causing this trigger toturn upon its pivot 92`and causing'- :the slotted portionfSS thereof toactuate the pin to turnthe crank 86 and thereby `turn the sleeve 39,fso` that the'lobe oflthe i cameplate 46 'which up to `this time has been active is movedoiit of engagement withfthe Apa'wl 94 and allows the pawl, under -the'tenJ sion ofthe spring' S1712, toengage theratchet-l.- wheel.Y When .the sleeveturnsythe connecti- Ving rod 9,9isactua`tedi to operateV the other crank87, which,` at the opposite spoohro-V tatestheother sleeve 89, thereby. actuatingftheother earn-plate 46fwhich results insliifting the lobe thereoffinto` engagement with the adjacent feed-pawl94 to press this' lpawl vout ofengagement with theadjlacent ratchet# wheel, so vthat'jnowlthe rlghtdiand ratchet` wheel-of Figure l is'idleand turnsjfloosely i withinits sleeve 49;V The'engagement of one Vthe other ,spool isbeingunwound. `Inthis manner the direction? of;Iribbon-feedis rep rersed automatically and nowfeeds freins:

pawl with its ratchet-wheel. and the disen-` gagement of the other Vpawl from its'ratchet wheelA are simultaneous, `soA that" while one spool is turning to wind up theribbon F52,

`character key; that the ribbon-carrier right :to left until the bead 77 atthe oppositeA endoftlieribbon `operates inthe manner just described to againautomatically*reverse the direction oftravel of the ribbon.

1t `will be obviousthat tlietypist need not p wait for the endof the ribbon to effectuate this reversal of the ribbon, butmay manually operate the handle96 at the left of the ma chine to shift the `connecting rod 99 in the proper `direction to either engage or disengagethe feed-pawl 94 and its detent pawl 10C7V `with or from" the: adgacent ratchetwheel 49. i

' It will lbe noted th'a't'each"ribbonguide operate's'at one time asa ribbonguide to direct the traveling ribbon to a .windingup spoor, and becomes-operative at. another itself between a movable part Vof the ribbon-feeding mechanism. and the ribbon-reribbon intermediate, the two u spools that the `part 57 at'the .winding-up spool-responds `through itstlexibility tothe sudden key imparted `stress on the ribbon byvibrating aboutits pivot 69 against tension of the spring' 65 and said `guidebecomes effective to prevent an impulsive ribbon'feeding` jerk being transferred to theribbon 5F that the Vguid e,"in 'being Vrestored by its"4 spring dur-A ing the return'of the ribbon-carrier, takes up any slack in the straightened-out ribbon between spools; that the jreversaliof `time at the paying-outfspool to interpose the direction 'for ribbonfeed `is practically instantaneousand accomplished duringfthe i typing ofasingle character; `and thatthe only stress placed upon the ribbonjdurmg the ribbon-reversa]v movement 1s thelswing- Aiigfof vthe carrier and the'T'light springpressed guide5ias aninterponent between movable Vribbon-feeding elementl and a normally inactive ribbonerelversing mechanism;

`;`'\7a`riations` maybe resorted to 'within the scope of the inventionyand port-ions ofthe improvements "may be -used without others.

,Having thus described `my invention,`

.claimt l@ In atypewriting 'machine7 thecombi- -nationof ,ribbon-spools; vertical shafts upon `whichsaid spools arefmountend5 'a sleeve embracing each 'ofsaid shafts rotatably, a ratchet-wheel `secured `upon "each of said' shafts, camssecured upon'each of said sleeves, na feed-pawl operatively associated `with* each of saidirsitcliet-wheels,4 and arranzgedto engagesaid cams7 mechanism for xrotating each "off said sleeves in opposite* directions, -respectively,a trigger foractuating veach of said mechanisms, vertical levers arranged, when tilted, to actuate said paivlsv A`alternately, ley-controlled connections for Y operating said levers, and al ribboncon nation trolled follower intervening between each vertical lever and one of said triggers and being engaged by said vertical lever to actu- 'ate the adjacent trigger to cause said cams to be actuated. j i

`2. In a typewriting machine, the combiof oppositely-arranged vertical shafts, bearings for "said, shafts, ratchetwheels fixed upon said shafts, feed-pearls engageable. with said ratchet-wheels, respec` tively, sleeves surrounding rotatably said shafts'in said bearings, cam-plates arranged to beswung byfsaid sleeves, means for ro.

tating yonersleeve to move one cam against Vone of said feed-pawls to idisengagezlsaid pawl from said ratchet-wheel, .means controlled by the last-named sleeve for turning the other sleeve to causeV the other cam to move the other pawl into-engagement;with thecother ratchet-wheei, ribbon-spools fixed upon said shafts, a ribbon :trained upon said spools, a vertical vlever pivoted upon each .nation of ribbonspools,

bearing `and engaging the vadjacent feedpawl` to actuate the latter, key-controlled means for oscillating eachI of said vertical levers, means'foractuating the firstnamed means, and a 'follower pivoted vertically 4upon each of said bearings and operated by one oscillating vertical levelnto cause it to operatethe actuating means.

In typewriting machine, the combi- 1 nation of" bearings, vertical shafts mounted rotatably therein, sleevesV embracing said shafts,' o`ranks on Vsaid sleeves, a connecting rod secured to` said cranks, cranks on said sleeves,` diametrieally opposite thev other Y cranks, horizontal levers for operating said i `last-named cranks, a trigger carried by each '4, lever,l a, ratchet-wheel secured upon each shaft, .a ribbon-spool secured upon" each shaft, feed-pawls operatively mounted adj a,- cent each VAratchet-wheel, acam-plate secured upon, eachisleeve,vlob as upon saidvcams so disposed relatively to said feed-pawlsthat` while-one lobe engages one pawl the otherlobe isdisengaged fromfthe other pawl, said Y cams turning with saidl sleeves, a driver for each'feedfpawl, anda follower pivoted upon said'bear-ing and associated with each trigger, each of said followers being alternately arranged to intervene between one driver end one trigger so as to be tilted by said driver inV order to engage said trigger to v tilt one ofsaid levers to actuate said sleeves.

4. In a typewriting machine, the combian v ink-ribbon trainedV thereupon, ratchet-wheels turning Y. with said spools, respectively, and having their teeth facing in opposite direct-ions so ras to be driven in opposite directions, fered. vpawls and detents engageable with` saidrre- Y spectifve ratchet-wheels,v ,cam-plates, having lobes movable relatively -to vsaid ratchet-Vv wheels iii projecting relation thereto, said lobes being so arranged 'for movement that onegpuslies the adjacent pawl out of en# gag-ement with one ratchet-'wlieelathe otherV pulls the adjacent `13auflinto engagement 'with the other ratchet-wheel, means vfor im parting movement toeach cam-plate, means for actuatingjeach ofsaid last-nainedmeaiis including `a trigger, a V-"follower projecting alongside 'eachV spool `iii-@a plane with'said ribbon aiidvfactuated by fthe.' vlatterperiodi` cally, horlzontal .pivots upon which said. Vfollowers Vare `mounted, Vmeansfor f allow-ing each of said followers toljs'winglinadirection towardssaid triggers soas t'ohaotuate `the latter, said followers,wliengactuated byV said ribbon swingingon said horizontal piv.-v

ots, to be' in `the path of saidtriggers, vand Y lrey-controlied means for pactuatin'g said pawls alternately, Ysaidv lastnamedjy means alternately urging one-of said followers to ln 'a typewriting' machine,'g the combination of braclmt-meiiibers,'Y vertical shafts A therein, sleeves Vsii-rrouiidiiig-i-,said shafts,

pawl-shifting4V cai'n@platesiV on said ,sleeves above saidmembers,z` ratchet-wheels fixed upon saidshafts, ribbon-spoolsmoving"with Y 1 said ratchet-wheels and havingoppositely'- Y inclined, teeth, feed-pawls-- yhoriZ 'intally-disposed pand held :adjacent the'respective wheels, one in engagement andthe other out of engagement with!4 the vrespective ratchet-wheels so` as to'drivefsaid.ratchetwheels; iii opposite directions, cranlisqupon saidsleeves designed Yto turii saidsleeves to oted verticallyo said.inembersfandbeing-V looselyY pivoted tov saidgpawls =for operating .the latter, `key-controlled Vmeansforimoving t said leverstofactuate `theni,-z pairof followers pivoted upon saidfmembermeach follower consisting of aportion-ipivoted for" movement-in the 'directionA offoiieof said 7 members, and another portionpivoted for movement in the directionof, said ,trigger, ajribbon i trained upon said? `sp )ol s','and

means onlsaid ribbonffor tilting-*one Vofsaid followers to causeiit to project betweeriponeV ofl saidL levers and triggers,` respectively, so

as, to be-iinpelledforward Aby said lever to impart movement toisaidtrigger. v

ias f 6. In' a `ty;pewritingmachine, the combi-j nation of'ja pairg-of -oppositely-disposed Yb raChet-meinbers, fvertical shaftsvtherein, ribbon-spools mounted fiXedly upon lsaidV shafts, sleeves surrounding saidshafts, caniliV T301 plates 4on said sleeves and moving therewith,'

j an ink-ribbon associated. with each spool for simultaneously Vcausing one spool tomove in the same direction with lthe other spool,

-a ratchet-'wheel `for each spool to rotate the same, means including feed-pawls Ifor -advancing said ratchet-wheels, said vcam-plates `engaging withA said feed ,pawls tov time thef actuation of the f latter, cranks, on ;said sleeves, means -controlled'by said ink-ribbon for fturning either ofV said cranks, another 'crankupon each of said sleeveafahandle for manually operating one of the 'last-` named cranks,l andA means `connecting the `hist-named cranks for causing Athem to move Vin unison and'toso'posit-ion themV that when one Vcam-plate. engages aV feed-pawl, Vthe other cam-plate is disengagedfrom its feedpawl.` i j i 7; In a typewritin'g machine, the `combination of a frame, a pair of ribbon-'spools Vmounted rotatably thereon, shafts `upon which Vsaid stools arefjournaled, ratchetwheels associated withsaid spools andhaving their teeth curvingin opposite directions, feed-pawls arranged to engage with4 eachof said wheels, cams set/so as to re-V spectively hold one pawl in and the other` pawl outof engagement with said ratchetwheels, so that-each pawlis enabled to ro-f tate the adjacent ratchet-wheel inan oppo.`

lsite direction, key-controlled mechanism for operating said pawls `to drive them in the Vsame directions, va ribbon on said spools arranged` to turnthe-` latter inthe same direction, diametricallyopposed cranks designed to 'operate said cams interchangeably, a hand lever connected to one ofsaid cranks, a trigger connected to the other of said cranks, -followers disposed adjacent "said mechanisnnmeans'onv said ribbon for swinging either ,ofgysaid followers to cause itto j project between saidtrigger and said mechanism, each of said `followers arranged to i ter,"andV means for holding either of 'spools against retrograde movement,l y j Sq/In a typewritin'g'machine, the combina--Y 'ti'on" of afcarriagegfa -main frame, bracketswing in 'the direction of said trigger and being actuated by said mechanism to engage i Y said trigger swingingly to operate thejlatsaid members securedat opposing sidesfofsaid frame, vertical shaftsmotinted in said meni- `bers, sleeves around said shafts, cranks xed` upon'said-.sleeves above said members,-cranks on said vrespective Vsleeves in said members,

spoolsxed upon said-shafts, ratchet-wheels iigredfupon said shafts under- `said i spools, pawls mounted'upon' said first-named cranks, springs urgingj said pawls in engagement" with said ratchet-wheels, cam-plates secured to said" sleeves above` said first-named cranks i and senso that one camiplate holds one pawl Y. out ofje'ngagementwith Aone ratchet-wheel againstlthe tension of one spring,iwhile`the other cam-plate holds the other pawl in engagement with the other ratchet-wheel under tension of the other spring, as said sleeves are rotated, an ink-ribbon on both spools and causing them' to rotate in the same direction, levers pivoted to said members and arranged,

`when actuated, to operate said second cranks to turn said sleeves, key-controlled means on cach member fordi'iving said pawls to alternately turn `said `ratchet-wheels, and

vsleeve, pins Ydepending from `each crank,

a web projecting outwardly from each boxing, a lever pivoted uponeach` web and hav- Aing a terminal slotted portion receiving,

respectively,one of said pins, horizontal pivots secured in spaced-apart relation fromv the front walls of said boxings,followers having lugs fulcrumed upon said pivots so asftovswing towards said boXings, means for causing said followers to swing at right angles to itsfirst swinging movement so as,

tobe engageable withsaid levers, means for .timing the last-named swinging movement of said; followers, said ribbon-feeding means movable in one direction, means controlled by either of said sleeves for'actuating said ribbon-feeding means, means on said sleeves co-operatiiig with the last-named `means to reverse the direction of movement of said ribbon-fe'edinf` means, and key-controlledY mechanism for operating intermittently said#sleeve-controlled means.` c

l0;4 Ina typewriting machine, the combination of oppositely-arranged bearings, horizontal ,pivots projecting therefrom,

levers fulcrumed Vu )on said oivot-sA sleeves l in'said bearings, cranks operatively movable above said bearings, and connected, to said sleeves,=.r1ght` angular `forks forinedfupon the `upper endsofsaid levers, pins `depend-v ing from said cranks received in said forks, means controlled byjsaid cranks i and designed-to feed an ink-ribbon in one direction, means designed to allow ythe `last-named ieans to reverse the direction of feeding of said ink-ribbon, means on each bearing for actuating the adjacent sleeve, followers, means ,for Auniversally pivoting each follower adjacenteach lever, ribbon-controlled means for tilting one follower in the path, of pivotal movement of the adjacent lever, and key- `'ni means whereby either of said key-controlled j controlled mechanism actuating the lastnamed lever to cause it to swing the adja- Vcentv follower along with it in order to cause the sleeve-actuating means to become active.

Yllulnfa typewriting machine, the lcom-v upon said levers,an integrall lug formed at the lower end of each of said followers, coilsprings secured respectively toV the "lugs formed at the Vlower ends of each follower and lever, outwardly-pro]ecting arms upon said followers, ksprings secured to said arms and Yto said bearings for holding said followers `at anormal bias, forwardly-projecting Vlips formed V`upon the lower ends of said followers, the upper portions of said: follow-- ers beingslotted to receive Vand hold an inliribbon, mechanisnrfor feeding said ribbon in one direction, means for Vcausing said mechanism to feed said Vribbon in a countery direction, nieansengaged by the lip of either Y follower for actuating the last-named means, Y and means for actuating said mechanism and for"predeterminately actuating either of said vfollowers to cause it to swingiover so as to engage said reversing means;V i

l2. ln a typewriting machine, the combivnation of a vertical shaft, a bearing therefor, Va ribbon-spool on. said sha-ft, a ratchet-wheel onV said shaft, a crankmovable around said.

shaft, a cam movable about saidshafua V.pawlon said' crank, a spring holding said pawl pressed inthe direction of'said cam',

ksaid cam Vpressing saidpawl outfof engagement with said ratchetewhcel and havinga surface movable into engagement withsaid pawl to allow it to engage saidratchetV` wheel, Vreciprocating means foractuating said pawl in a ratchet-wheel-drivingdirecf-V tion, an ink-ribbon passing upon said spool,

key-controlled mechanism,` `a connectionbef tweenfsaid mechanism and said reciprocatL ing means, a follower having its upper end, spaced from said cam and'havmg its lower end projecting inwardly, means Hcontrolled by the last-named end of said follower fon moving said cam, and means for positioning` said follower forA predeterminately.disposing itin the path of movement ofl said reciprocating means so as tobe actuated by thev latter tooperate'said last-named means: l 13. In atypewriting machine, ribbon-reversing mechanism, an Voscillatable member controlling the saine, a cranlrearm for actuating said member, Va horizontal lever, connected. so as to operate said crank-arm, a depending -'lug upon said lever, a verticallever pivoted so as to swing over toward said lug when actuated and actuate it to startsaid horizontal lever, lteylcontrolled` mechanism,

and means acting-'in time with saidlastfj named finechanism- .for predeterminatelyf shiftingsaid'lever against said lug.

' lll. In a typewritmg machine,lthe combination ofribbon-reversing mechanism, -a

a vertical `follower `pivoted thereto bearing, and having a ribbon movably threaded vinto its iupper portion, a horiz'ontally-disposed` trigger also pivoted thereto, at right angles to saidfollower, a spring on said bearing normally inclinin'g said follower to separate u lits lowerei'id from the outer endqof saidl level, means acting in time with the move ment of a ribbon' for-tilting said follower,

against the tension of said spri,ng,1into ,env- V gageable=relationship.with said leverriby bonfifeeding niechanism,mean s whereby said last-named mechanism may cause saidfol-'f lower topush said lever, and meansactua'ted upon the pushing ofsaid leverfor actuating saidribbonfreversing mechanism.` i

.15,7In aptypewriting machine,the combination voffa bearing, a vertical shaft therein, a spool Von saidshaft, a ratchetwheel on said shaft, a. feed-pawl, means on;

said shaft for reciprocating said pawl, one

stroke of saidpawl positioning it for turn-V ing` said ratchet-wheel'and theotherstroke -V thereof effecting'said rotation, means engagfY ingsaidpawl to holdin-disengaged from".

said ratchetfwheel while being reoiprocated,

a'spring pressing said pawl against said wheel, or against said pawl-engagingmeans,

means for disengaging said pawl-engaging means tojallow said pawl to turn saidwheel vand spool, 'i1-,trigger 'actuating'the llastnained means, a-vertical. lever positioned, to

simultaneously engage with said reciprocat-- i v105 the ,former during the first-named stroke.;V of said-pawlso as tothe contacted with said', l ti-.igfger toactuatethe latter, and aspring ing means and said-trigger and operated by normally` holdingr said .lever ina position-to be` disengageable from` said Vreciprocatin'g means and trigger.

is. A ribbon-@Osannafouetter,ansia? ing of a sheet-metal member having oneend formed' with aV guide-slot having a lateral keraflateral ear formedon one edge, a lateral `arm tormedjon its OppOsite edgesv llt) rightangular lug formedA upon 'saidflateralf arm @attending in Vtlie'same direction as said` ear,` a downwardlyeextending arm formed at '1 its opposite, end, slanting forwardly toward the extremity of said lug, and an' angular lug vformediupon said last-mentioned arm.

17 .ln combinati'omga carrier formedfat its upper endf with Ia pair of lugs, third lugformed on-said carrier extending in the same direct-ion assaidlotherlugs, a ribbon-L.-

controlled followeroverlying saidycarrierf andextendingv above and below saidcarrier,

a pivot on saidhcarrier uponwhichsaid fol?, i lower is :fulcrumed,` a lug on said followers ila l(nopositethe third lug on the carrier, an ear on one edge of said follower contacting the adjacent edge of said carrier, ,and a coiled spring secured between one lug Aon the carrier andthe lug on thefollovver and operative to resilientlyhold said ear inl contact with the adjacent edge of said carrier to hold said follower in alignment therewith.

l 18. ln a typewriting machine, the combination of a pair of rotatable spools having a ribbonV trained thereon, a ribbon-guide for 'l each spool pivotally mounted foruniversal `movement and engaged by said ribbon, key- `driven means for rotatingfeach ribbon-spool, means for each spool for rendering its ro-l tating means inoperative and simultaneously rendering the rotatingmeans of the other spool operative, thus reversing the direction of ribbon-feed during the down stroke of the key, and yieldable means for holding each ribbon-guide in a uniform norvmal position, each guide being swingable from the normal position by said ribbon into co-operativerelationwith one of said rotating means, andsvvingable thereby to drive the means operative to reverse the direction of ribbon-feed. l

l19. In a typewvriting machine, the combination of a pair of-rotatable spools having a ribbon trained thereon, a follower for each spool pivotally mounted foruniversal movement and engagedfby said ribbon, lreyoperated means including a pivoted pawlcarrying lever for rota-ting` each ribbonspool, and means for each spool including aV pivoted paWl-lifting cam for rendering its pawl inoperative,and at the same time rendering the pawls ofthe other spool operative, thus reversing therdifrection of ribbon-feed,

` each follower being stvingable byA said ribbon into co-operative relation with one of the pand-carrying levers, and svvingablethereby to actnate the paWl-lifting cam 'to effect a reversal of the direction ofribbon-feed.Y

' 20. in a typevvritingmachine, the combination With a ribbon 'mechanism including f ribbon-spools, key-driven mechanism for feeding the ribbonv from spool to spool, and

means to vibrate the ribbon to cover the typing position, of a ribbon-guide for each spool having a pivotedcarrierpivotally support-V ing said guide, said guide being operative in f one direction of its swing to equalize the tion, of a ribbon-guide vfor each spool and each guide operativeto swing about separate pivots,sa1d guide svvingable about one pivot to respond to the tensionplaced upon the lribbon by the vibrator in covering the typing Vposition and svvingable about the other pivot through the feeding of the ribbon to predetermine the direction of feed for the ribbon.

22. In a typewritingmachine, the com- I bination with a ribbon mechanism including ribbon-spools, mechanism forl feeding the ribbon from spooi to spool, and means to vibrate the ribbon to cover the typing position, of a ribbon-guide for each spool and -each guide operative to swing about separate pivots at right angles to each other,

-said 'guides stvin'gable about one pivot to respond to the tension placed on the ribbon by the vibrator 'in covering the typing posi-V tion and swingable about the other pivot by the feeding of the ribbon to predetermine the direction of feed for the ribbon.

23.V in a typewriting machine, the combination with a ribbon mechanism, includinga pair of ribbon spools, key-driven mechanism operative to 'rotate either spool and feed the ribbon from spool to spool on the .doWn stroke of the `key, and a reversing mechanism operative to reverse the direction of the spool-fed ribbon, of a` vertically-disposedL carrier pivotally mounted upon the frame adjacent each spool, and a ribbonguide pivotally mountedV upon each carrier, each guide being svvingable upon its carrier to tension the ribbon in typing, and swingable With its carrier under a ribbon-feeding stress to determine the direction of the ribbon-feed from spool to spool.

WILLIAM A. DOBSON. 

